gftool.fourier.tt2z_herm2

gftool.fourier.tt2z_herm2(tt, gf_t, z, herm2=<bound method Hermite2.from_taylor of <class 'gftool.hermpade.Hermite2'>>, quad='trapz', **kwds)[source]

Square Fourier-Padé transform of the real-time Green’s function gf_t.

Uses a square Hermite-Padé approximant for the transform. The function requires an equidistant tt.

Parameters

tt(Nt) float np.ndarray: The equidistant points for which the Green’s function gf_t is given.
gf_t(…, Nt) complex np.ndarray: Green’s function at time points tt.
z(…, Nz) complex np.ndarray: Frequency points for which the Laplace transformed Green’s function should be evaluated.

Returns

gf_z(…, Nz) complex np.ndarray: Laplace transformed Green’s function for complex frequencies z.

Raises

ValueError: If the time points tt are not equidistant.